Evaluations of variant models for stacking fault energy based on γ-TiAl

Jinkai Wang, Zehang Fu, Zhanpeng Lu, Hao Wang, Yanlin He, Masanori Kohyama, Ying Chen

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The stacking fault energy (SFE) is of great significance to understand deformation behaviour of materials. Calculated by different models, the SFEs show differences and influence our understanding. Several typical models have been applied to γ-TiAl and discussed with Ab initio calculation systematically. Different models have a little effect on the calculated intrinsic stacking fault energy (ISFE), while affect the calculated unstable stacking fault energy (USFE) a lot. An alias-to-affine deformation transform is being found in 6-layer model. The local energy analysis indicates it is caused by the intrinsic properties of the materials. Combined with experiment observation and theoretical prediction, deformation patterns are compared and discussed.

Original languageEnglish
Pages (from-to)3096-3115
Number of pages20
JournalPhilosophical Magazine
Volume99
Issue number24
DOIs
Publication statusPublished - 2019 Dec 17

Keywords

  • Ab initio
  • deformation pattern
  • local energy
  • stacking fault energy
  • γ-TiAl

ASJC Scopus subject areas

  • Condensed Matter Physics

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